What is the cheapest airline that flies from Colorado to Sofia?

British Airways and United Airlines are the most popular carriers operating from Colorado to Sofia

What airlines fly to Sofia?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Sofia from Colorado according to our data. United Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 3 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Sofia?

Flight times vary depending on what airport in Colorado you fly out of and what airport in Sofia you fly into. For example, flying from Denver to Sofia takes 16h 25m on average. On the other hand, flying from Grand Junction to Sofia takes 45h 13m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

When did momondo last update prices for flights from Colorado to Sofia Airport?

Prices for flights from Colorado to Sofia Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Colorado to Sofia Airport?

As of November 2026, there are 3 operators available to choose from for flights from Colorado to Sofia Airport.

How old do you have to be to fly from Colorado to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The required travel and health documents for your Sofia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$289 Cheap Flights from Colorado to Sofia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:25 am - 1:15 pmDEN Denver Intl-SOF Sofia

16h 50m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

6:25 am - 6:13 pmSOF Sofia-DEN Denver Intl

20h 48m2 stops Frankfurt am Main Vancouver Intl

$701Multiple Airlines

Mon, Feb 8 - Wed, Feb 17

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

6:25 am - 4:35 pmSOF Sofia-DEN Denver Intl

18h 10m1 stop Frankfurt am Main

$707Lufthansa

Mon, Mar 8 - Wed, Mar 17

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

6:25 am - 7:20 pmSOF Sofia-DEN Denver Intl

21h 55m2 stops Frankfurt am Main Vancouver Intl

$707Multiple Airlines

Mon, Feb 8 - Wed, Feb 17

4:15 pm - 6:20 pmDEN Denver Intl-SOF Sofia

17h 05m1 stop Munich Franz Josef Strauss

6:25 am - 8:26 pmSOF Sofia-DEN Denver Intl

22h 01m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$709Multiple Airlines

Mon, Mar 8 - Wed, Mar 17

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

7:05 pm - 2:30 pmSOF Sofia-DEN Denver Intl

28h 25m1 stop Munich Franz Josef Strauss

$718Lufthansa

Mon, Feb 8 - Wed, Feb 17

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

7:05 pm - 2:30 pmSOF Sofia-DEN Denver Intl

28h 25m1 stop Munich Franz Josef Strauss

$718Lufthansa

Mon, Feb 8 - Wed, Feb 17

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

6:25 am - 1:40 pmSOF Sofia-DEN Denver Intl

16h 15m1 stop Frankfurt am Main

$728United Airlines

Tue, Feb 9 - Thu, Feb 18

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

6:25 am - 1:40 pmSOF Sofia-DEN Denver Intl

16h 15m1 stop Frankfurt am Main

$728United Airlines

Tue, Feb 9 - Wed, Feb 17

8:25 pm - 3:05 pmDEN Denver Intl-SOF Sofia

33h 40m1 stop Istanbul

9:10 pm - 6:20 pmSOF Sofia-DEN Denver Intl

30h 10m1 stop Istanbul

$778Turkish Airlines

Thu, Apr 29 - Mon, May 10

7:30 pm - 8:40 amDEN Denver Intl-SOF Sofia

28h 10m1 stop Istanbul

9:30 am - 5:25 pmSOF Sofia-DEN Denver Intl

16h 55m1 stop Istanbul

$778Turkish Airlines

Mon, Nov 30 - Wed, Dec 23

Cheap last minute flights

Enter your travel dates to find the best prices.

1:30 pm - 10:55 pmASE Aspen Pitkin County-SOF Sofia

24h 25m2 stops Denver Intl Munich Franz Josef Strauss

6:25 am - 6:37 pmSOF Sofia-ASE Aspen Pitkin County

21h 12m2 stops Frankfurt am Main Chicago O'Hare Intl

$935Lufthansa

Sun, Nov 15 - Fri, Dec 4

3:18 pm - 10:55 pmASE Aspen Pitkin County-SOF Sofia

46h 37m2 stops Denver Intl Munich Franz Josef Strauss

6:25 am - 6:37 pmSOF Sofia-ASE Aspen Pitkin County

21h 12m2 stops Frankfurt am Main Chicago O'Hare Intl

$941Lufthansa

Sat, Nov 14 - Fri, Dec 4

8:45 am - 10:55 pmASE Aspen Pitkin County-SOF Sofia

29h 10m2 stops Denver Intl Munich Franz Josef Strauss

6:25 am - 10:42 amSOF Sofia-ASE Aspen Pitkin County

37h 17m2 stops Frankfurt am Main Denver Intl

$953United Airlines

Sun, Nov 15 - Wed, Nov 25

11:23 am - 10:55 pmASE Aspen Pitkin County-SOF Sofia

26h 32m2 stops Denver Intl Munich Franz Josef Strauss

6:25 am - 2:37 pmSOF Sofia-ASE Aspen Pitkin County

41h 12m2 stops Frankfurt am Main Denver Intl

$953United Airlines

Wed, Nov 11 - Thu, Nov 26

11:23 am - 10:55 pmASE Aspen Pitkin County-SOF Sofia

26h 32m2 stops Denver Intl Munich Franz Josef Strauss

6:25 am - 10:42 amSOF Sofia-ASE Aspen Pitkin County

37h 17m2 stops Frankfurt am Main Denver Intl

$953United Airlines

Wed, Nov 11 - Wed, Nov 25

2:17 pm - 10:55 pmASE Aspen Pitkin County-SOF Sofia

23h 38m2 stops Los Angeles Munich Franz Josef Strauss

6:25 am - 2:37 pmSOF Sofia-ASE Aspen Pitkin County

41h 12m2 stops Frankfurt am Main Denver Intl

$953United Airlines

Sun, Nov 15 - Thu, Nov 26

2:17 pm - 10:55 pmASE Aspen Pitkin County-SOF Sofia

23h 38m2 stops Los Angeles Munich Franz Josef Strauss

2:00 pm - 10:42 amSOF Sofia-ASE Aspen Pitkin County

29h 42m2 stops Munich Franz Josef Strauss Denver Intl

$955United Airlines

Sun, Nov 15 - Fri, Nov 27

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

2:00 pm - 7:44 pmSOF Sofia-DEN Denver Intl

38h 44m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$1,024Multiple Airlines

Sun, Nov 15 - Sun, Nov 29

4:15 pm - 10:55 pmDEN Denver Intl-SOF Sofia

21h 40m1 stop Munich Franz Josef Strauss

7:00 pm - 3:35 pmSOF Sofia-DEN Denver Intl

29h 35m1 stop Frankfurt am Main

$1,218Lufthansa

Sun, Nov 15 - Sun, Nov 29

1:30 pm - 11:35 pmDEN Denver Intl-SOF Sofia

25h 05m3 stops Toronto Pearson Intl Munich Franz Josef Strauss Václav Havel Prague

6:25 am - 4:50 pmSOF Sofia-DEN Denver Intl

43h 25m2 stops Frankfurt am Main Toronto Pearson Intl

$1,533Multiple Airlines

Sun, Nov 15 - Sun, Nov 29

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United Airlines flights from Colorado to Sofia

Our best United Airlines deals on Colorado to Sofia flight tickets

United Airlines

Feb 9

DEN4:15 pmDenver Intl

21h 40m

1 stop

SOF10:55 pmSofia

Feb 17

SOF6:25 amSofia

16h 15m

1 stop

DEN1:40 pmDenver Intl

$728

United Airlines

Feb 8

DEN4:15 pmDenver Intl

21h 40m

1 stop

SOF10:55 pmSofia

Feb 18

SOF6:25 amSofia

23h 02m

2 stops

DEN8:27 pmDenver Intl

$731

United Airlines

Feb 10

DEN7:40 amDenver Intl

30h 15m

2 stops

SOF10:55 pmSofia

Feb 19

SOF6:25 amSofia

16h 15m

1 stop

DEN1:40 pmDenver Intl

$732

Lufthansa flights from Colorado to Sofia

Our best Lufthansa deals on Colorado to Sofia flight tickets

Lufthansa

Feb 8

DEN4:15 pmDenver Intl

21h 40m

1 stop

SOF10:55 pmSofia

Feb 17

SOF7:05 pmSofia

28h 25m

1 stop

DEN2:30 pmDenver Intl

$718

Lufthansa

Feb 7

DEN4:15 pmDenver Intl

17h 05m

1 stop

SOF6:20 pmSofia

Feb 18

SOF6:00 amSofia

17h 30m

1 stop

DEN2:30 pmDenver Intl

$729

Lufthansa

Feb 7

DEN4:15 pmDenver Intl

17h 05m

1 stop

SOF6:20 pmSofia

Feb 19

SOF6:00 amSofia

17h 30m

1 stop

DEN2:30 pmDenver Intl

$735

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 2/8

11:25 am-1:15 pm

2 stops16h 50m

Sofia

Wed 2/17

6:25 am-6:13 pm

2 stops20h 48m

$701

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 3/8

4:15 pm-10:55 pm

1 stop21h 40m

Sofia

Wed 3/17

6:25 am-4:35 pm

1 stop18h 10m

$707

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 2/8

4:15 pm-10:55 pm

1 stop21h 40m

Sofia

Wed 2/17

6:25 am-7:20 pm

2 stops21h 55m

$707

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 3/8

4:15 pm-6:20 pm

1 stop17h 05m

Sofia

Wed 3/17

6:25 am-8:26 pm

2 stops22h 01m

$709

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 2/8

4:15 pm-10:55 pm

1 stop21h 40m

Sofia

Wed 2/17

7:05 pm-2:30 pm

1 stop28h 25m

$718

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 2/8

4:15 pm-10:55 pm

1 stop21h 40m

Sofia

Wed 2/17

7:05 pm-2:30 pm

1 stop28h 25m

$718

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Tue 2/9

4:15 pm-10:55 pm

1 stop21h 40m

Sofia

Thu 2/18

6:25 am-1:40 pm

1 stop16h 15m

$728

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Tue 2/9

4:15 pm-10:55 pm

1 stop21h 40m

Sofia

Wed 2/17

6:25 am-1:40 pm

1 stop16h 15m

$728

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Thu 4/29

8:25 pm-3:05 pm

1 stop33h 40m

Sofia

Mon 5/10

9:10 pm-6:20 pm

1 stop30h 10m

$778

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Mon 11/30

7:30 pm-8:40 am

1 stop28h 10m

Sofia

Wed 12/23

9:30 am-5:25 pm

1 stop16h 55m

$778

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Colorado to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Colorado is in March. Flight prices, which tend to average around $623, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Sofia from Colorado during April instead. Flights to Sofia in April, while not as cheap as those in March, still average around $634.

How far in advance should I book a flight from Colorado to Sofia?

You are more likely to see cheaper flights to Sofia from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $834 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Colorado for as low as $701 on momondo.

Cheap Colorado to Sofia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Sofia

Best Price Found	$289
Fastest flight time	16h 25m
Direct flights	None

The best one-way flight to Sofia from Colorado in the past 72 hours is $289. The best round-trip flight deal from Colorado to Sofia found on momondo in the last 72 hours is $701.

The fastest flight from Colorado to Sofia takes 16h 25m

There are no direct flights from Colorado to Sofia. There are no popular flight routes from Colorado to Sofia.

Search flight deals

Frequently asked questions about flying from Colorado to Sofia

When did momondo last update prices for flights from Colorado to Sofia Airport?
Prices for flights from Colorado to Sofia Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Colorado to Sofia Airport?
As of November 2026, there are 3 operators available to choose from for flights from Colorado to Sofia Airport.
How old do you have to be to fly from Colorado to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The required travel and health documents for your Sofia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Colorado to Sofia

Compare and see reviews for airlines that fly from Colorado to Sofia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $520	Free Cancellation	Rating 7.3 10,476 reviews	Search United Airlines flights
Turkish Airlines	PriceFrom $571	Free Cancellation	Rating 7.4 4,467 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $713	Free Cancellation	Rating 6.8 8,292 reviews	Search Lufthansa flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Sofia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Sofia from Colorado.

Can I find flights from Colorado to Sofia with flexible booking policies on momondo?

Flights from Colorado to Sofia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Colorado to Sofia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Colorado to Sofia.

I’m not ready to book a flight from Colorado to Sofia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Colorado to Sofia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sofia and let you know when they change.

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Cheap flights from Colorado to Sofia from $289

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Sofia departing on 12/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Colorado to Sofia

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Our best Lufthansa deals on Colorado to Sofia flight tickets

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How to get the cheapest flight ticket from Colorado to Sofia

What is the cheapest month to fly to Sofia?

How far in advance should I book a flight from Colorado to Sofia?

What is the cheapest airline that flies from Colorado to Sofia?

What airlines fly to Sofia?

How long does it take to fly to Sofia?

Cheap Colorado to Sofia flight deals and tips

Best Price Found

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Frequently asked questions about flying from Colorado to Sofia

Best airlines flying from Colorado to Sofia

Compare and see reviews for airlines that fly from Colorado to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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Cabin classes currently available on flights to Sofia

List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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